In AmE, we'd say "get in line." "Fall in line" is more of a military expression. If someone tried to cut in front of you, you might also tell him, "sorry, back of the line!" while gesturing with your thumb behind you.2. We are all standin' in line, suddenly a friend came and wanted to cut in line and I said " please get in line" and then he corrected me by sayin', it's not "get in line' it should be "fall in line"...what's the difference?
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